diff --git a/testDB.py b/testDB.py
index 00ddf11..e02d463 100644
--- a/testDB.py
+++ b/testDB.py
@@ -46,20 +46,20 @@ with app.app_context():
     db.session.add(student2)
     db.session.add(student3)
 
-    g1 = Group(number=1, program=program1)
-    g2 = Group(number=1, program=program2)
-
-    db.session.add(g1)
-    db.session.add(g2)
-
-    ps1 = PartStudent(student=student1, part=part1, group=g1)
-    ps2 = PartStudent(student=student2, part=part1, group=g1)
-    ps3 = PartStudent(student=student3, part=part2, group=g2)
+    ps1 = PartStudent.customInit(student=student1, part=part1)
+    ps2 = PartStudent.customInit(student=student2, part=part1)
+    ps3 = PartStudent.customInit(student=student3, part=part2)
 
     db.session.add(ps1)
     db.session.add(ps2)
     db.session.add(ps3)
 
+    g1 = Group.customInit(part_students=[ps1, ps2])
+    g2 = Group.customInit(part_students=[ps3])
+
+    db.session.add(g1)
+    db.session.add(g2)
+
     ex1 = Experiment(
         number=1,
         program=program1,
@@ -95,8 +95,8 @@ with app.app_context():
     db.session.add(sx1)
     db.session.add(sx2)
 
-    gx1 = GroupExperiment(semester_experiment=sx1, group=g1)
-    gx2 = GroupExperiment(semester_experiment=sx2, group=g2)
+    gx1 = GroupExperiment.customInit(semester_experiment=sx1, group=g1)
+    gx2 = GroupExperiment.customInit(semester_experiment=sx2, group=g2)
 
     db.session.add(gx1)
     db.session.add(gx2)
@@ -124,18 +124,10 @@ with app.app_context():
     db.session.add(as1)
     db.session.add(as2)
 
-    ap1 = Appointment(date=date(2021, 3, 21), special=True, group_experiment=gx1, assistant=as1)
-    ap2 = Appointment(date=date(2021, 3, 22), special=True, group_experiment=gx2, assistant=as2)
+    ap1 = Appointment.customInit(date=date(2021, 3, 21), special=True, assistant=as1, group_experiment=gx1)
+    ap2 = Appointment.customInit(date=date(2021, 3, 22), special=True, assistant=as2, group_experiment=gx2)
 
     db.session.add(ap1)
     db.session.add(ap2)
 
-    em1 = ExperimentMark(oral_mark=11, protocol_mark=14, part_student=ps1, group_experiment=gx1, assistant=as1)
-    em2 = ExperimentMark(oral_mark=12, protocol_mark=14, part_student=ps2, group_experiment=gx1, assistant=as1)
-    em3 = ExperimentMark(oral_mark=13, protocol_mark=14, part_student=ps3, group_experiment=gx2, assistant=as2)
-
-    db.session.add(em1)
-    db.session.add(em2)
-    db.session.add(em3)
-
     db.session.commit()